We’ve spent the last few weeks harping on the recent rally in small-cap stocks and how it has helped give a boost to the broad market. But if you missed out on the rally, you may want to think twice about joining the party. Small caps are starting to look a bit pricey.

The Russell 2000 index of small-capitalization stocks — mostly made up of companies with less than $2 billion market caps — is up more than 4% throughout the last two weeks and has risen 13% since early June, outpacing the Dow Jones Industrial Average and S&P 500.

Other small-stock benchmarks have had similar returns. The S&P SmallCap 600 is up 14% since June. Eight of the 10 smallcap sectors within the index have outpaced their larger brethren, with financials and tech being the lone exceptions.